666473271 has 16 divisors (see below), whose sum is σ = 894436320. Its totient is φ = 441423360.

The previous prime is 666473239. The next prime is 666473351. The reversal of 666473271 is 172374666.

It is a happy number.

It is not a de Polignac number, because 666473271 - 2⁵ = 666473239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666473201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343821 + ... + 345753.

It is an arithmetic number, because the mean of its divisors is an integer number (55902270).

Almost surely, 2^666473271 is an apocalyptic number.

666473271 is a deficient number, since it is larger than the sum of its proper divisors (227963049).

666473271 is a wasteful number, since it uses less digits than its factorization.

666473271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626.

The product of its digits is 254016, while the sum is 42.

The square root of 666473271 is about 25816.1436120889. The cubic root of 666473271 is about 873.4959832284.

The spelling of 666473271 in words is "six hundred sixty-six million, four hundred seventy-three thousand, two hundred seventy-one".